Method and means for ribbon weaving



Sept. 29, 1936. w. NICOLET 2,055,553

METHOD AND MEANS FOR RIBBON WEAVING Filed Oct. 12, 1935 5 Sheets-Sheet l fm/enfoz:

Sept. 29 1936. w. NKCOLET 2,055,553

METHOD AND MEANS FOR RIBBON WEAVING Filed Oct. 12, 1935 3 Sheets-Sheet 2 Sept. 29, 1936. w. NICOLET METHOD AND MEANS FOR RIBBON WEAVING 5 Sheets-Sheet 5 Filed Oct. 12, 1933 fnvenfoz:

Ratented Sept.- 29, 1936 PATENT- OFFICE METHOD AND MEANS FOR RIBBON WEAVINC Walther Nicolet, Leipzig, Germany Application October 12, 1933, Serial No. 693,338

In Germany October 17, 1932 4 Claims.

My invention refers to the art of weaving and more especially to the methods and means disclosed in my United States Patents Nos. 1,764,574, 1,764,575 and 1,764,577. The present invention is an improvement upon the methods and means disclosed inthe above-mentioned Letters Patent and has for its particular object to prevent failure in the operation of the means when adapted to ribbon weaving,

I have found that the method disclosed.in the Letters Patent mentioned above can be particularly adapted to ribbon weaving by entering the weft material in the open rear shed only after this rear shed has been opened up to the edge of the fabric by moving apart the two rows of guides, and that at the same point where the weft is entered in the closed front shed. To insure satisfactory tying of the fabric on the edges thereof it is advisable to enter the weft loop in the closed front shed alternately from the right and left, that is, from the right when the device for entering therear weft is on the righthand side of the warp threads, and from the left when this device is on theleft side of the warp threads. In order to enter the rear weft on the same level as the front weft the 'device for .entering the weft in the opening shed operates on another horizontal plane than the device which enters weft material in the closed shed.

By way of example, the method according to the invention is illustrated diagrammatically in three different steps in the accompanying'draw ings, in which Figure 1 is a side view of the loom parts for carrying out the method shown in the position in which the two rows of guides are guided into one another and two sheds are formed one behind the other and one of the two front thread guides has entered the first part of the loop which is beaten up already by the reed;.

Fig. 2 is a top view of Fig. 1;

Fig. 3 is a side view of the parts at the time when the two rows of guides are moved apart again so that the rear shed is opened up to the edge of the fabric andthe rear thread guideenters weft material;

Fig. 4 is a top view of Fig. 3; I

Fig. 5 is a View similar to Fig. 1 showing how the second front thread guide enters weft material; and

Fig. 6 is a top view of Fig. 5.

Referring to the drawings. I and 2 are two .groups of warp threads diverging at a certain angle from the edge of the fabric A, as indicated in a special row of-guides designated 3 and 4. If these two rows of guides 3 and 4 are moved towards and past one another, a shed will be formed onthe edge of the fabric, the groups of warp threads I and 2 continuing, however, to 5 diverge infront of the crossing point 5, as shown in Fig. 1. Between the two rows of guides 3 and 4 and the edge of the fabric A and on each side of the warp threads I and 2 the bars 6 and 6!] are respectively arranged in one line and extend l0 vertically to the group of warp threads I and 2. These bars 6 and are reciprocatory in their longitudinal direction, and their ends facing each other carry the rectangular arms 6 and 60 which extend to the fabric edge A. Along the 15 bars 6, 60 and their arms 6, 60 extend the threads 8, 8' guided in eyes and coming from bobbins, not shown. Behind the crossing point 5 of the groups of warp threads a second reciprocatory bar 1 extending vertically to the 0 threads I, 2 is provided which also has a rectangular arm 1' projecting towards the fabric edge A. This arm 1' terminates approximately on a level with the arms 6, 60 but is disposed below the path of motion of these arms. Through 25 eyes of the bar I and its arms I a thread 9 is drawn which comes from a bobbin, not shown. The bars 6, 60 and I serve for entering the weft material, the bars 6, 6|] entering it in the form of a loop while the bar I enters it as a single 30 weft thread. The bars 6, 60 and 7 do not operate simultaneously, of course, but alternately so that each operation of one of the bars 6, 60 is followed after the change of shed by an operation of the bat 1. While each individual bar 6 and 60 is always on one and the same side of the warp threads when in a position of rest, (the bar 6 being, of course, on the one side of the warp threads and the bar 60 on the other side) the bar I with its arm I is, in the same position, 40 located alternately to the right or left of the warp threads, and the weft is entered in the closed front shed always by the member 6 or 60 near which the arm 1' of the rear weft inserting member l is positioned when the closed front shed, 45 is formed (Figs. 2 and 6). On each side of the fabricedge a double-armed lever a or ND is provided and swings about a pin in. These levers carry on the underside of their end facing the members 6 or 60 a pin I2 50 while their other end is engaged by a bar l3 connected with a control mechanism of the loom gear. By means of this control mechanism the two levers Ila and II b are individually deflected atthe proper time so as to lower the end carrying 55 rality of laminae and oscillatorily arranged at IS.

on one journal of the reed M an arm I6 is firmly disposed and connected by the rod .l'l engaging wards the weft inserting member 60.

the free end thereof with a control mechanism of the loom gear.

In order to describe'the weaving process be it assumed that the two rows of guides 3 and 4 are moved apart, as shown in Fig. 3, that the two weft inserting members 6 and 60 are in positions of inertia and the arm I of the weft inserting member I is on the same side as the member 60. As indicated in Fig. 4, in the further application of the, process the arm 1' of the member 1 passes through the open shed and from the member 60 to the member 6. When the arm I has arrived near the member 6, the reed l4 beats up the weft entered in the open shed by the weft inserting member I to thefell of the fabric. The goods are moved and a closed shed is formed, as shown in Fig. 1, by moving the two rows of guides 3 and 4 towards each other. Through this closed shed the weft inserting member 6 will move now to When the arm- 6 of the member 6 has emerged from the shed near the member 60, the reed l4 will beat up the just inserted thread, as shown in Fig. 2. Simultaneously, the lever III) is deflected and its pin l2 caused to move behind the weft thread which has just been beaten up. After moving the goods, the weft thread guide 6 returns to its initial position while the pin l2 of the lever I lb prevents the beaten up thread from being drawn out of the shed so that a loop is formed. When the member 6 has attained its original position, the

rows of guides 3 and 4 will'move apart again and the second portion of the loop will be. beaten up by the reed l4, the lever I lb being moved during this beating stepso as to cause its finger I2 to come out of the loop. Owing to the separation of the rows of guides 3 and 4, a shed has been produced again that is perfectly open up to the fell of the fabric, as shown in Fig. 3, and through which the arm I of the weft entering member I is moved from the weft entering member 6 towards the member 60. When the arm 1 has left the open shed, the reed l4 will beat up again the thread just entered and the goods will be moved again. Then the rows of guides 3 and 4 will approach-each other and form again a closed shed, as shown in Fig. 5, through which the thread guide 60 will move towards the thread guide 6. When the arm 60' has come out of the closed shed near the member 6, the thread just entered will be beaten up, the goods will be moved and the lever I la actuated so that its pin I2 is behind the thread just beaten up. Then the weft thread guide 60 will return to initial position. When this position has been reached the second portion of the loop just entered will be beaten up,the pin {2 drawn out of the loop and the goods moved whereupon the two rows of guides 3 and 4 will move apart again so as to produce by the two groups of warp threads I and 2 a shed that is open up to the fell of the fabric. Conditions are now as they were when the process was started, and the steps described are then continually repeated.

As indicated in the drawings, the ends of the loops entered by the members 6 and 60 are not tied up, but are so firmly held in the fabric that they cannot get out again. However, in order to eliminate the slight risk of withdrawal of these loops, their ends can be tied up in known manner by a special selvedge-thread which alternately passes through the loops from above and below. Several steps in the process described may coincide. For example, the change of shed may take place simultaneously with the motion of the goods or with the beating up and the various weft entering members may begin to act already when the weft entering member that has been operating last is not yet completely at rest. Moreover, it is immaterial whether the goods are moved prior to or after beating up.

I claim:

1. The method of producing a ribbon by weaving comprising: moving two groups of warp threads confining a free space. in the form of an angle between them so as to form a closed shed, inserting in said shed immediately' adjacent to the fell of the fabric a weft thread, beating up this weft thread, inserting in the same shed a second weft thread forming a loop with the first named weft thread, winding up the fabric a certain distance and beating up the second weft thread, moving said groups of warp threads backward to open said shed, and inserting between the two diverging groups of warp threads a weft thread in such manner as to position it immediately on its insertion closely adjacent to the fell of the fabric over its whole length.

2. The method of producing a ribbon by weaving comprising: moving two groups of warp threads confining a free space in the form of an angle between them so as to form a closed shed, inserting in said shed immediately adjacent to the fell of the fabric a weft thread, beating up this weft thread, inserting in the same shed a second weft thread forming a loop with the first named weft thread, winding up the fabric a certain distance and beating up the second weft thread, moving said groups of warp threads backward to open said shed, and inserting between the two diverging groups of warp threads a weft thread in such manner that immediately on its insertion it is positioned over its whole length closely adjacent to the fell of the fabric, the weft loop being inserted alternately from the left and right of the two groups of warp threads.

3. The method of producing a ribbon by weaving comprising: moving two groups of warp threads confining a free space in the form of an angle between them so as to form a closed shed, inserting in said shed immediately adjacent to the fell of the fabric a weft thread, beating up this weft thread, inserting in the same shed a second weft thread forming a loop with the first named weft thread, winding up the fabric a certain distance and beating up the second weft thread, moving said groups of warp threads backward to open said shed and inserting between the two diverging groups of warp threads a weft thread in such manner that it is located immediately upon its insertion over its whole length closely adjacent to the fell of the fabric, the

weft loop being inserted alternately from the left positioned the one on the left hand side of thespu um 3 warp threads and the other on the right hand side of the warp threads, 9. third bar arranged parallel to the said two bars behind the crossing point of the two groups of warp threads, all bars being provided with an arm extending nearly up to the fell of the fabric and serving for guiding the weft threads, the two bars in alinement being moved alternately to and fro between the two groups of warp threads within the closed shed ll for inserting therein a weft loop and the third bar being moved once between the two diverging groups of warp threads and the other time out of the diverging groups of warp threads for inserting therein a single weft thread after one of the two other bars has finished its movement and before the other of these bars begins its movement and means for beating up the two parts of the looped weftseparately as well as said single weft thread. WALTHER NICOLEI. 

